यदि (f(x)=\frac{1}{\sqrt{x-1}}), तो वास्तविक प्रान्त कौन-सा है?
If (f(x)=\frac{1}{\sqrt{x-1}}), what is the real domain?
Explanation opens after your attempt
A. (\(1,\infty\))
Concept
For the square root, \(x-1\ge0\) is needed.
Why this answer is correct
But \(\sqrt{x-1}\) is in the denominator, so it cannot be zero.
Exam Tip
Thus (x-1>0), so the domain is (\(1,\infty\)). चरण 1: वर्गमूल के लिए \(x-1\ge0\) चाहिए। चरण 2: लेकिन हर में \(\sqrt{x-1}\) है, इसलिए यह शून्य नहीं हो सकता। चरण 3: अतः (x-1>0), यानी प्रान्त (\(1,\infty\)) है।
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